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EP0501283A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Optical organism measuring apparatus

Assignee: Shimadzu Corp
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Filing: 1992-02-18
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Granted: —
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Expires: 2012-02-18
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Abstract

Abstract Disclosed herein is an optical organism measuring apparatus in which cables provided on both light transmission and receiving sides are sufficiently reduced in diameter and provided with flexibility for attaining handleability while light can be transmitted and received in high efficiency so that information can be obtained from a deep portion in an organism. Semiconductor lasers (2-1, 2-2, 2-3) are coupled with incident ends of a plurality of single core optical fibers which are contained in a flexible probe (12), so that laser light guided by the single core optical fibers is applied to an organism (8) from a forward end portion of the probe (12). A light receiving probe (18) is provided on its forward end with a silicon photodiode (14), which is attached in close contact to the organism (8) to receive light transmitted through or reflected by the organism (8). This silicon photodiode (14) is integrated with a preamplifier (16). A cable for transmitting a detection signal which is amplified by the preamplifier (16) is formed by a flexible shielding wire.

Inventors

  • 👤 Tomomi Tamura
  • 👤 Hideo Eda

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 13:46
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/1455; A61B5/14551; A61B5/14553

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 89 words
An optical organism measuring apparatus for applying light of a specific wavelength to an organism and detecting said light being transmitted through or reflected by said organism thereby obtaining vital information, said apparatus comprising: a light application side having a semiconductor laser serving as a light source and a probe for guiding laser light emitted from said semiconductor laser to said organism through a single core fiber; and a light detection side having a solid state detector being integrated with a preamplifier for receiving said light from said organism.
Claim 2
Dependent Claim 37 words
An optical organism measuring apparatus in accordance with claim 1, wherein an incident end of said single core optical fiber provided in said probe for light transmission is coupled to said semiconductor laser through a laser module.
Claim 3
Dependent Claim 51 words
An optical organism measuring apparatus in accordance with claim 1, wherein said probe for light transmission is provided in its forward end portion with a prism for reflecting said laser light perpendicularly to the direction of the optical fiber axis in said probe for applying reflected said light to said organism.
Claim 4
Dependent Claim 50 words
An optical organism measuring apparatus in accordance with claim 3, wherein a part of a forward end portion of said probe for light transmission to be in contact with said organism is provided with a window plate for transmitting said laser light, being reflected by said prism, to said organism.
Claim 5
Dependent Claim 62 words
An optical organism measuring apparatus in accordance with claim 3, wherein a part of a forward end portion of said probe for light transmission to be in contact with said organism is provided with a spacer of a light transmitting material having a proper thickness for transmitting said laser light, being reflected by said prism, and guiding the same to said organism.
Claim 6
Dependent Claim 19 words
An optical organism measuring apparatus in accordance with claim 5, wherein said spacer is formed by an elastic body.
Claim 7
Dependent Claim 21 words
An optical organism measuring apparatus in accordance with claim 1, wherein said solid state detector is formed by a silicon photodiode.
Claim 8
Dependent Claim 39 words
An optical organism measuring apparatus in accordance with claim 1, wherein a cable provided in the light receiving side for transmitting a signal from said preamplifier to the apparatus body is formed by a thin shielding wire having flexibility.
Claim 9
Dependent Claim 58 words
An optical organism measuring apparatus in accordance with claim 1, wherein said light source is formed by a plurality of semiconductor lasers having different wavelengths and said probe for light transmission contains single core optical fibers in correspondence to respective said semiconductor lasers, said optical fibers being bundled into a sheath within said probe and provided with flexibility.
Claim 10
Dependent Claim 44 words
An optical organism measuring apparatus in accordance with claim 9, wherein said light source is formed by three types of semiconductor lasers having different wavelengths, said semiconductor lasers being successively switched by a driving circuit to be detected by common said solid state detector.
Claim 11
Dependent Claim 78 words
An optical organism measuring apparatus in accordance with claim 10, wherein the oscillation wavelength of each said semiconductor laser is set to be at least 700 nm and an age-based absorbance change is calculated from a detection signal of said solid state detector every wavelength while fluctuation as well as oxygen saturation of hemoglobin in blood are calculated with previously set absorbance coefficients so that said optical organism measuring apparatus is applied to a near infrared oxygen monitor.

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